Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b9f68f06bf4031d…

MALICIOUS

PDF

54.7 KB Created: 2021-05-09 03:10:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9952148083cd222e5eafb852c6574919 SHA-1: d9193aca0599fc99be887d798206f3375e38ed48 SHA-256: 0b9f68f06bf4031d1d78ddc1b676c8cf7b3bb9e3afe56b578a173fd968ed3f10
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm for SEO manipulation or phishing. The embedded URLs, such as 'https://crewmak.ru/uplcv?utm_term=audacity+software+free++for+android', are designed to mimic search results, likely to trick users into downloading malware or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7673

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crewmak.ru/uplcv?utm_term=audacity+software+free++for+android
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/0a4be5a38a4f03d5db60f98a72ef67e9/fizikupuxugalopu.pdf
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/dbf59bdcc0bcd37a9905a1131ac77ad3/21337062770.pdf
    • http://alliance-ltd.com/userfiles/rutodir.pdf
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16080412a4f12c---ruwinukufonetiwubafebepox.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087dffa515e7---73089514604.pdf
    • https://aartipalette.com/userfiles/file/19337559230.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4cad4535b---4308808766.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/8c407a913a546c86e28d9759b59bf293/68802669896.pdf
    • https://anmoul.com/userfiles/file/mimaviparo.pdf
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/2d01d38686efa3fa38b58cbc3c66474a/pixelomutaxeto.pdf
    • http://vonkoenigsmund.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca29302753---bunugagatepibug.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/ohhpkp2t3k4qk6lg3n8hkoigkb/zupobaganatuw.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712a14813e8---pamojenobi.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/130daf7f47bce40bfc35b73b99ca978d/dobegelibisododenuxik.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/63fbe49a454d7616c79f44a9fa9d4057/26119999859.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c42863f9e9---ropuwoguwi.pdf

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